So, I bought a Mugen replica bumper from a fellow member but it has screw holes that I want to patch up. Their just screw holes so they are very small. Will bondo do the job for me or is their something better to patch up these holes. The bumper cover is fiberglass if that makes a difference.
fiberglass it. and then put a bit of bondo to smooth it out.
Use that fiberstrand stuff. Its fiberglass resin with strands of fiberglass mixed in. Its like a fiberglass version of bondo. Dries quick to and is very strong.